US3721655A
Expired / Lapsed
US
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Copolymers of halfesters of maleic anhydride and -alkoxypropene
Assignee: Novartis Corp
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Filing: 1971-01-08
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Granted: 1973-03-20
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Expires: 1991-01-08
Abstract
Abstract Alkylene oxide monoether halfesters of maleic anhydride/2alkoxypropene copolymers and alkyl and alkylene oxide mixed halfesters of said copolymers are homogeneous film-forming compositions useful in hair spray preparations. These halfesters are prepared by the esterification of the maleic anhydrive/2alkoxypropene copolymer with an appropriate alcohol.
Inventors
- 👤 P Schlumbom
- 👤 D Gordon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:05
CPC Classifications
A; A61; A61Q; A61Q5/00; A61Q5/06; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/81; A61K8/8164; C; C08; C08F; C08F16/00; C08F16/12; C08F22/00; C08F22/04; C08F8/00; C14; C14C; C14C11/00; C14C11/003; Y; Y10; Y10S; Y10S424/00; Y10S424/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
33 words
A hair spray composition of claim 1 wherein the halfester copolymer is a mixed n-butanol/polyethylene glycol methyl ether halfester of maleic anhydride/2-methoxypropene copolymer wherein the molecular weight of said glycol is about 750.
Claim 2
Dependent Claim
35 words
A hair spray composition of claim 1 wherein the halfester copolymer is a mixed ethanol/polyethylene glycol monostearyl ether halfester of maleic anhydride/2-methoxypropene copolymer wherein the glycol monostearyl ether has a molecular weight of about 1150.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |